🇺🇸 United States ZIP Code

STANDARD

98579

Rochester

ZIP Code 98579 is a standard zip code serving Rochester, Rochester, Washington (WA), in Thurston County, United States. It has an estimated population of 12,870 with a median household income of $55,419. The area falls within the America/Los_Angeles timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Washington (WA)
County: Thurston
City: Rochester
Timezone: America/Los_Angeles

Coordinates

Latitude: 46.819300
Longitude: -123.040600

Geographic Details

Land Area: 90.49 mi²
Water Area: 0.64 mi²
Population Density: 142.0 people per mi² (55th percentile)
Bounding Box: 46.901859°N, 46.706234°S, -122.922313°E, -123.330516°W

With 12,870 residents spread across 90.49 square miles, this area has a population density of 142.0 people per square mile.

Demographics

12,870

Population

70th percentile

$55,419

Median Income

65th percentile

$225,800

Median Home Value

75th percentile

90.49 mi²

Land Area

The median household income in 98579 is $55,419, and the median home value is $225,800.

Housing

5,009

Total Units

4,756

Occupied Units

94.9%

Occupancy Rate

Similar ZIP Codes in Washington

ZIP codes with similar median household income in Washington.

99212

Spokane

$52,161

98589

Tenino

$55,720

98675

Yacolt

$59,085

98557

Mccleary

$51,690

98648

Stevenson

$53,009

98390

Sumner

$51,863

99122

Davenport

$51,981

98936

Moxee

$57,841

Frequently Asked Questions

What information is available for each ZIP code?

Each ZIP code page shows city, state, county, geographic coordinates, timezone, population, median household income, median home value, housing units, land area, population density, commute time, educational attainment, area codes, and ZIP code type (Standard, PO Box, or Unique).

What are the different types of ZIP codes?

There are three types of ZIP codes: Standard (residential and commercial delivery areas), PO Box (assigned to post office box sections), and Unique (assigned to a single high-volume address like a government agency or large company). Standard ZIP codes are the most common.

How often is ZIP code data updated?

ZIP code assignments are updated quarterly by the USPS. Demographic data comes from the US Census Bureau's American Community Survey (ACS), which releases new 5-year estimates annually. ZipFYI updates its data to reflect the latest available information.

What is population density and why does it matter?

Population density measures the number of people per square mile in a ZIP code area. It helps identify urban vs. rural areas, affects real estate values, impacts service availability, and is used in market analysis. Dense urban ZIP codes may have 50,000+ people per square mile.

How are ZIP code boundaries determined?

ZIP code boundaries are determined by the USPS based on mail delivery routes, not political or geographic boundaries. They follow carrier routes and may cross city, county, or even state lines. Boundaries can change when the USPS reorganizes delivery operations.

What does median household income tell me about a ZIP code?

Median household income is the middle value when all household incomes in a ZIP code are sorted. Half of households earn more and half earn less. It is a better indicator of typical earnings than average income, which can be skewed by very high or very low outliers.